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WO2000015435A1 - Imagerie lithographique comprenant des structures dotees de couches oleophiles inorganiques - Google Patents

Imagerie lithographique comprenant des structures dotees de couches oleophiles inorganiques Download PDF

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Publication number
WO2000015435A1
WO2000015435A1 PCT/US1999/020837 US9920837W WO0015435A1 WO 2000015435 A1 WO2000015435 A1 WO 2000015435A1 US 9920837 W US9920837 W US 9920837W WO 0015435 A1 WO0015435 A1 WO 0015435A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
compound
metal
dopant
oleophilic
Prior art date
Application number
PCT/US1999/020837
Other languages
English (en)
Inventor
Ernest W. Ellis
Original Assignee
Presstek, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/151,497 external-priority patent/US6073559A/en
Application filed by Presstek, Inc. filed Critical Presstek, Inc.
Priority to AU59185/99A priority Critical patent/AU5918599A/en
Publication of WO2000015435A1 publication Critical patent/WO2000015435A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/006—Printing plates or foils; Materials therefor made entirely of inorganic materials other than natural stone or metals, e.g. ceramics, carbide materials, ferroelectric materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1033—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials by laser or spark ablation

Definitions

  • the present invention relates to digital printing apparatus and
  • a printable image is present on a printing
  • ink can be any organic (oleophobic) surface areas. Once applied to these areas, ink can be any organic (oleophobic) surface areas. Once applied to these areas, ink can be any organic (oleophobic) surface areas. Once applied to these areas, ink can be any organic (oleophobic) surface areas. Once applied to these areas, ink can be any organic (oleophobic) surface areas. Once applied to these areas, ink can be
  • Dry printing systems utilize printing members whose
  • ink-repellent portions are sufficiently phobic to ink as to permit its direct
  • the recording medium only in the imagewise pattern.
  • the recording medium In typical sheet-fed press systems, the recording medium is pinned to an impression cylinder, which brings it into contact
  • the non-image areas are hydrophilic
  • dampening fluid to the plate prior to inking.
  • the dampening fluid prevents
  • Plate-imaging devices amenable to computer control include
  • the plate constructions include an inorganic layer
  • the inorganic layer ablates in
  • IR infrared
  • inorganic layer represents the topmost surface of the plate and accepts
  • dampening fluid while the underlying polymeric layer accepts ink.
  • Application of an imaging pulse to a point on the plate ultimately creates an imaging pulse
  • inorganic layers may undergo failure (e.g., fracturing) due to temperature
  • polymeric layers may be selected
  • a polymeric layer may also be pretreated (e.g., through
  • the present invention replaces the conventional polymeric ink-
  • the plates may also be provided with a protective layer that serves a
  • the plate constructions of the present invention include a
  • an overlying layer provides sufficient thermal insulation to
  • thermal insulation is adequate if the imaging power (at a given pulse width)
  • thermally insulating substrates having thermally insulating (e.g., polyester) substrates.
  • the plates of the present invention can be either "positive-working"
  • hydrophilic layer that will reject ink during printing
  • the applied inorganic layers are
  • a hydrophilic ceramic layer may be used to anchor a hydrophilic ceramic layer to the oleophilic
  • the oleophilic layers may be any suitable oleophilic layer.
  • the oleophilic layers may be any suitable oleophilic layer.
  • member refers to any type of printing member or surface capable of
  • suitable configurations include the traditional
  • planar or curved lithographic plates that are mounted on the plate cylinder
  • hydrophilic is used in the printing sense to
  • Such fluids include water for conventional ink systems, aqueous
  • FIG. 1 is an enlarged sectional view of a negative-working
  • FIG. 2 is an enlarged sectional view of a positive-working
  • printing members includes at least one laser device that emits in the region
  • laser output can be provided directly to the plate surface via lenses or other beam-guiding components, or transmitted to the
  • the controller responds to incoming
  • the image signals are stored as a bitmap data file on a
  • Such files may be generated by a raster image processor
  • a RIP can accept input data
  • bitmaps are
  • the imaging apparatus can operate on its own, functioning solely as
  • a platemaker or can be incorporated directly into a lithographic printing
  • printing may commence immediately after
  • the imaging apparatus can be configured as a flatbed
  • the exterior drum design is more appropriate to use in situ, on a lithographic
  • the beam can move parallel to
  • the beam is drawn across either axis of
  • the requisite relative motion between the beam and the plate may be
  • the writing array is
  • construction 100 includes a hard substrate 1 10, a hard ceramic layer 1 1 2,
  • a tying layer 1 1 4 a tying layer 1 1 4, and a hydrophilic, metallic inorganic layer 1 1 6.
  • Substrate 1 10 is strong, stable and flexible, and is preferably a metal sheet.
  • Preferred metal substrates have thicknesses of 0.005 inch or more.
  • substrate 1 1 0 may be a multilayer composite including
  • Layer 1 1 2 is oleophilic, hard, and flexible enough to permit normal
  • layer 1 1 2 must maintain its own internal integrity notwithstanding
  • layer 1 1 2 is deposited at a thickness of at least 500 o
  • layer 1 1 2 should not degrade despite repeated
  • Preferred materials for layer 1 1 2 include ceramics, a class of material
  • Ceramics include such covalent hard materials as B 4 C, BN,
  • AIB 12 SiC, SiB, Si 3 N 4 , and AIN, among others. Suitable materials may also be used.
  • dopants such as copper, to improve ink receptivity.
  • Layer 1 1 4 which is optional, is a a metal that may or may not
  • the thickness of layer 1 14 depends on the application.
  • layer 1 14 is applied at thicknesses of
  • Layer 1 14 functions as a tying layer if the surface characteristics of hard layer 1 1 2 are not well-suited to acceptance and
  • anchorage of the metallic inorganic layer may otherwise be omitted.
  • the metal of layer 1 1 4 is at least one d-block (transition) metal, aluminum " ,
  • the metals are present as an alloy
  • Oxidation can occur on both metal surfaces, and may
  • Layer 1 1 6 is a metallic inorganic layer comprising a compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at least one compound of at
  • component of layer 1 1 6 may be a d-block (transition) metal, an f-block
  • (lanthanide) metal aluminum, indium or tin, or a mixture of any of the
  • Preferred metals include titanium, zirconium, vanadium,
  • the non-metal component niobium, tantalum, molybdenum and tungsten.
  • layer 1 1 6 may be one or more of the p-block elements boron, carbon,
  • cases e.g., Al-Si compounds
  • Preferred metal/non-metal combinations include TiN, TiON, TiO x (where 0.9 ⁇ x ⁇ 2.0), TiAIN, TiAICN,
  • a protective layer 1 20 may be deposited over metallic inorganic layer
  • this layer can serve a variety of beneficial functions:
  • hydrophilicity as that term is used in the printing industry, i.e., accepting
  • Protective layer 1 20 performs these functions but mostly
  • Protective layer 1 20 preferably comprises a polyalkyl ether or
  • the polyalkyl ether or polyvinyl alcohol compound when applied as a liquid, the polyalkyl ether or polyvinyl alcohol compound
  • the average molecular weight may have a relatively substantial average molecular weight (i.e., at least
  • a coating liquid should also exhibit sufficient viscosity to
  • a preferred formulation for aqueous coating 1 20 comprises 2.5 parts
  • polyvinyl alcohol e.g., the Airvol 203 product sold by Air Products and
  • the temperature of the dispersion is elevated to 85-96 °C, and held
  • the solution is coated over a ceramic printing plate surface and dried
  • a protective layer at a thickness of about 0.2 to 0.4 ⁇ m.
  • the protective layer 1 20 is preferably applied at a
  • the thinner layer 120 can be made, the more quickly
  • FIG. 2 illustrates a positive-working plate in
  • the illustrated construction 200 includes a
  • hard substrate 21 0, an inorganic hydrophilic layer 21 2, a thin metal layer-
  • layer 21 6 are modified by application of a very thin oleophilic layer 21 8,
  • construction 200 may be covered by a protective layer 220.
  • layer 21 2 receives fountain solution rather than
  • Layer 21 2 is ordinarily a ceramic material, as defined above,
  • a suitable material is indium tin oxide applied
  • substrate 21 0 is an anodized aluminum sheet as
  • Layer 21 2 is revealed during the imaging process as layers 214,
  • 21 4, 21 6, 21 8 are applied at a collective thickness that does not preclude
  • Layer 21 is an optional tying layer applied at a thickness of 50-5000 A; a representative
  • layer is titanium metal applied to a thickness of 300 A, but once again,
  • layer 1 14 may be at least one d-block (transition) metal, aluminum, indium
  • Layer 21 6 is a metallic inorganic layer analogous to layer 1 1 6
  • overlying layer 21 8 combine with overlying layer 21 8 to serve as an ink-accepting surface.
  • layer 21 8 dopes layer 21 6, conferring oleophilicity thereto.
  • 21 6 may be applied at thicknesses ranging from 100-5000 A, but given
  • Layer 21 8 is oleophilic, and may be an oleophilic metal such as
  • Layer 21 8 may be deposited by a
  • impart oleophilicity— may be quite thin.
  • the plates 100, 200 may be utilized with wet-printing ink systems,
  • deletion fluids such as the
  • addition materials (such as a fine-point

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

L'invention concerne des structures de plaques lithographiques négatives et positives, comprenant une couche hydrophile durable; une couche dure oléophile inorganique, et un substrat qui peut être un métal. Si on utilise un substrat métallique, une couche de recouvrement fournit une isolation thermique suffisante pour empêcher une dissipation substantielle de la chaleur nécessaire à la réalisation d'une ablation dans le substrat. Lorsqu'on utilise des couches oléophiles dans des réalisations avec copie au négatif, certains matériaux en céramique sont appropriés, et on peut utiliser une couche intermédiaire de liaison pour ancrer une couche hydrophile en céramique sur la couche oléophile. Selon des modes de réalisation en copie positive, les couches oléophiles peuvent être des composés réfractaires dopés par un matériau oléophile. Ces dernières réalisations offrent la possibilité d'appliquer des moyens de correction traditionnels après une imagerie.
PCT/US1999/020837 1998-09-11 1999-09-10 Imagerie lithographique comprenant des structures dotees de couches oleophiles inorganiques WO2000015435A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU59185/99A AU5918599A (en) 1998-09-11 1999-09-10 Lithographic imaging with constructions having inorganic oleophilic layers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/151,497 US6073559A (en) 1998-09-11 1998-09-11 Lithographic imaging with constructions having inorganic oleophilic layers
US09/151,497 1998-09-11
US09/390,553 US6279476B1 (en) 1998-09-11 1999-09-03 Lithographic imaging with constructions having inorganic oleophilic layers
US09/390,553 1999-09-03

Publications (1)

Publication Number Publication Date
WO2000015435A1 true WO2000015435A1 (fr) 2000-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/020837 WO2000015435A1 (fr) 1998-09-11 1999-09-10 Imagerie lithographique comprenant des structures dotees de couches oleophiles inorganiques

Country Status (2)

Country Link
AU (1) AU5918599A (fr)
WO (1) WO2000015435A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108076A1 (fr) * 2004-05-05 2005-11-17 Presstek, Inc. Element d'impression lithographique comportant une couche polymerisee par plasma
WO2006130241A3 (fr) * 2005-04-15 2007-01-18 Presstek Inc Impression lithographique faisant appel a des elements d'impression contenant un metal oleophile et des couches polymeres plasma

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0825021A2 (fr) * 1996-08-20 1998-02-25 Presstek, Inc. Structures à couches minces pour l'enregistrement de l'image à base de couches métalliques-anorganiques et comportant des structures optiques d'interférence
EP0844080A2 (fr) * 1996-11-25 1998-05-27 Presstek, Inc. Plaques lithographiques pour l'enregistrement au laser, auto-nettoyantes et résistantes à l'abrasion
WO1998030400A1 (fr) * 1997-01-06 1998-07-16 Presstek, Inc. Structures d'impression lithographique humide comprenant des couches inorganiques metalliques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0825021A2 (fr) * 1996-08-20 1998-02-25 Presstek, Inc. Structures à couches minces pour l'enregistrement de l'image à base de couches métalliques-anorganiques et comportant des structures optiques d'interférence
EP0844080A2 (fr) * 1996-11-25 1998-05-27 Presstek, Inc. Plaques lithographiques pour l'enregistrement au laser, auto-nettoyantes et résistantes à l'abrasion
WO1998030400A1 (fr) * 1997-01-06 1998-07-16 Presstek, Inc. Structures d'impression lithographique humide comprenant des couches inorganiques metalliques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108076A1 (fr) * 2004-05-05 2005-11-17 Presstek, Inc. Element d'impression lithographique comportant une couche polymerisee par plasma
US7078152B2 (en) 2004-05-05 2006-07-18 Presstek, Inc. Lithographic printing with printing members having plasma polymer layers
WO2006130241A3 (fr) * 2005-04-15 2007-01-18 Presstek Inc Impression lithographique faisant appel a des elements d'impression contenant un metal oleophile et des couches polymeres plasma
US7351517B2 (en) 2005-04-15 2008-04-01 Presstek, Inc. Lithographic printing with printing members including an oleophilic metal and plasma polymer layers

Also Published As

Publication number Publication date
AU5918599A (en) 2000-04-03

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